Facility alarms provide a useful tool for operators to easily track and display the basic status of their equipment facilities. Facility Alarm support is intended to cover a focused subset of router states that are likely to indicate service impacts (or imminent service impacts) related to the overall state of hardware assemblies (cards, fans, links, and so on).
In the CLI, for brevity, the keyword or command alarm is used for commands related to facility alarms. This chapter may occasionally use the term alarm as a short form for facility alarm.
The CLI display for show routines allows the system operator to easily identify current facility alarm conditions and recently cleared facility alarms without searching event logs or monitoring various card and port show commands to determine the health of basic equipment in the system such as cards and ports.
The SR OS alarm model is based on RFC 3877, Alarm Management Information Base (MIB), (which evolved from the IETF Disman drafts).